diff --git a/CHANGELOG.md b/CHANGELOG.md
index d192f7b..6d8b0b6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,17 @@
 # Change Log
 
+## [v8.1.0]() (2018-06-10)
+
+**Added**
+- added `blog` data type. Various methods in `EventRegistry` class accept it, such as `suggestNewsSources()`, `suggestSourcesAtPlace()` and `getNewsSourceUri()`.
+
+**Updated**
+- `QueryArticlesIter.initWithComplexQuery()` now accepts also the `dataType` parameter (by default `news`).
+
+**Removed**
+- Removed the parameter `articleBatchSize` from `QueryArticlesIter.execQuery` since it was not useful. We are always returning the maximum number of results that can be obtained with a single query.
+
+
 ## [v8.0]() (2018-04-10)
 
 **Added**
diff --git a/eventregistry/QueryArticles.py b/eventregistry/QueryArticles.py
index e693c48..796cabd 100644
--- a/eventregistry/QueryArticles.py
+++ b/eventregistry/QueryArticles.py
@@ -226,7 +226,6 @@ def execQuery(self, eventRegistry,
                   sortBy = "rel",
                   sortByAsc = False,
                   returnInfo = ReturnInfo(),
-                  articleBatchSize = 100,
                   maxItems = -1,
                   **kwargs):
         """
diff --git a/eventregistry/QueryEvents.py b/eventregistry/QueryEvents.py
index e1fb481..0ca06e6 100644
--- a/eventregistry/QueryEvents.py
+++ b/eventregistry/QueryEvents.py
@@ -504,15 +504,19 @@ def __init__(self,
 
 class RequestEventsConceptTrends(RequestEvents):
     def __init__(self,
+                 conceptUris = None,
                  conceptCount = 10,
                  returnInfo = ReturnInfo()):
         """
         return a list of top trending concepts and their daily trending info over time
-        @param conceptCount: number of top concepts to return (at most 50)
+        @param conceptUris: list of concept URIs for which to return trending information. If None, then top concepts will be automatically computed
+        @param count: if the concepts are not provided, what should be the number of automatically determined concepts to return (at most 50)
         @param returnInfo: what details about the concepts should be included in the returned information
         """
         assert conceptCount <= 50
         self.resultType = "conceptTrends"
+        if conceptUris != None:
+            self.conceptTrendsConceptUri = conceptUris
         self.conceptTrendsConceptCount = conceptCount
         self.__dict__.update(returnInfo.getParams("conceptTrends"))
 
diff --git a/eventregistry/_version.py b/eventregistry/_version.py
index 73d4c8b..70dab03 100644
--- a/eventregistry/_version.py
+++ b/eventregistry/_version.py
@@ -1 +1 @@
-__version__ = "8.0.0"
+__version__ = "8.1.0"
diff --git a/eventregistry/tests/TestQueryArticles.py b/eventregistry/tests/TestQueryArticles.py
index 22779b1..f31bb99 100644
--- a/eventregistry/tests/TestQueryArticles.py
+++ b/eventregistry/tests/TestQueryArticles.py
@@ -30,7 +30,7 @@ def testArticleUriWgtList(self):
         expectedCount = iter.count(self.er)
 
         countPerPage = 20000
-        pages = math.ceil(expectedCount / countPerPage)
+        pages = int(math.ceil(expectedCount / countPerPage))
         q = QueryArticles(conceptUri=self.er.getConceptUri("germany"))
         items = []
         for page in range(1, pages+1):
diff --git a/eventregistry/tests/TestQueryEvents.py b/eventregistry/tests/TestQueryEvents.py
index 888a408..d145ea9 100644
--- a/eventregistry/tests/TestQueryEvents.py
+++ b/eventregistry/tests/TestQueryEvents.py
@@ -191,7 +191,7 @@ def testConceptTrends(self):
         self.assertIsNotNone(res.get("conceptTrends"), "Expected to get 'conceptTrends'")
         self.assertIsNotNone(res.get("conceptTrends").get("trends"), "Expected to get 'trends' property in conceptTrends")
         self.assertIsNotNone(res.get("conceptTrends").get("conceptInfo"), "Expected to get 'conceptInfo' property in conceptTrends")
-        self.assertTrue(len(res["conceptTrends"]["conceptInfo"]) == 5, "Expected to get 5 concepts in concept trends")
+        self.assertTrue(len(res["conceptTrends"]["conceptInfo"]) <= 5, "Expected to get 5 concepts in concept trends")
         trends = res["conceptTrends"]["trends"]
         self.assertTrue(len(trends) > 0, "Expected to get trends for some days")
         for trend in trends: